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What size book cover are you using to work with? The image for an ePub Marketing Image is not far removed from the ratio of most common book covers. What I have often wondered is what happens to the 'standard' size of Marketing image that Lulu ask for for an ePub when sent to Kindle to be converted for Kindle? Because when publishing direct to Amazon for Kindle Amazon ask for a different size and ratio.

Because we offer distribution on EPUBs to a range of retailers, we had to create a "standard" size that we could easily (at a minimum loss of quality) convert to the various sizes retailers need. With that in mind, the minimum size for a cover is 612x792 pixels, and so long as you maintain that ratio, your cover should fill the preview space.

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I'm working with the A5 book cover size. I'll post an example of what I mean:

Do you see how the normal cover (the second image) isn't scaled the same as the ePUB one. There is no option to trim the excess for the ePUB, rather you have to either fill in the gap with a color (as in my first image) or try to use a transparent canvas. The transparent canvas gets changed to the theme cover when creating the marketing image of an ePUB, with no option to not show the color.

I've seen a few of the authors get around this problem by picking a color that they fill the left and right edges with as I've done in my first image.

@Paul_Lulu&nbsp;I've been trying to work on that ratio. I noticed that when scaling a larger image down to the smaller size that lettering loses its edge a little, so I worked on scaling it down manually myself to solve the problem.

@Em_PressI did initially use the second standard cover, but what I found was that it had to have some background color created by Lulu. If it was white, it was fine on sites that had a white background, but not so good on those that were shaded slightly.